Clamp for making boxes.



No. 643,55l. Patented Feb. 13, won. w. L. SMITH.

CLAMP FOR MAKING BOXES.

(Application filed. May 13, 1899.)

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GU50 H12 5 UNITED STATES PATENT OFFICE.

\VALTER L. SMITH, OF CHICAGO, ILLINOIS, ASSIGNOR TO HENRY DATE, OFAUSTIN, ILLINOIS.

CLAMP FOR MAKING BOXES.

SPECIFICATION forming part of Letters Patent No. 643,551, dated February13, 1900. Application filed May 13, 1899. Serial No. 716.772. (Nomodel.)

T0 00 whom it may concern.

Be it known that I, WALTER L. SMITH, a citizen of the United States, anda resident of Chicago, county of Cook, and State of Illinois, haveinvented certain new and useful Improvements in Clamps for Making Boxes,of which the following is a specification, and which is illustrated inthe accompanying drawings, forming a part thereof.

This invention relates to clamps adapted for use in the manufacture ofboxes or filecases having a rounded edge, such edge being formed byoverlapping portions of the two larger sides of the box, the object ofthe invention being to provide a clamping device by means of which suchboxes may be readily and cheaply constructed and in which theclamping-jaws are given an even and uniform pressure throughout theentire length of their contacting faces.

The invention consists of a table, a rail secured thereto, a jawprojecting from the rail over the table, a clamping-jaw cooperating withthe first-mentioned jaw and having a transverse rib across its back orrearward face, and intermediate of its ends a wedge rod or blockentering between the table and this rib, so as to force the clampingjawagainst the first-mentioned jaw and secure an even pressure throughoutthe entire length of the contact-ing faces.

The invention consists in further details of construction, ashereinafter set forth, and as illustrated in the accompanying drawings,in which Figure 1 is a plan view of a plurality of boxes in theconstruction of which my im proved clamp is adapted to be used. Fig. 2is an isometric view of one of such boxes. Fig. 3 is an end elevation ofthe clamp, the clamping-jaw and the box in process of construction beingshown in section. Fig. 4 is a detail perspective of the clamp with theclamping jaw removed. Fig. 5 is a view similar to Fig. 3, the box,however, not being within the clamp and the jaws being separate. Figs. 6and 7 are transverse ver:

tical sections of the clamping-jaws, showing two forms of dies; and Fig.8 is an end elevation of the jaws.

The box A is oblong, rectangular in form,

and is open at the top. Its sides and ends are formed of two boards aI), each of which is of sufficient length so that its end portions maybe scored and bent to form the end walls, 5 5

the adjacent ends of the two sides a I? overlapping and being gluedtogether. At the rounded end of the box each of the overlapping portionsis offset, as shown at c d, to

form a shoulder against which the end of the clamping-jaws of anyconsiderable length in which a uniformity of pressure may be securedfrom end to end. These difficulties have been overcome in the clampwhich forms in {part the subject of this application and which I willnow proceed to describe.

This clamp comprises a plate or table E, upon'which there is secured arail F, having in its upper face a longitudinal T-groove f.

A jaw G is secured to the upper face of the rail F, so as to projectlaterally therefrom across the table E. This jaw is adjustablelongitudinally of the rail F and is secured thereto by means of ascrew-bolt H, havinga T-head which enters the groove f, this boltextending through the upper face of the jaw G, and a nut h being appliedto it, by means of which the jaw maybe rigidly fixed in any position towhich it may be adjusted upon the rail. To the under face of theprojecting portion of the jaw G there is detachably secured a 0 shoe Mor M, Fig. 7, which conforms in shape to the box end to be secured.Ishow this shoe as being attached by means of a pair of screws 'm,passing downwardly through the jaw G. A die 0, adapted to cooperate with5 the shoe M, is placed below the jaw G and is secured between a pair ofcheek-plates 0, the three parts being united by screws, as shown at P.The plates 0 extend below the die 0,

and substantially midway of their length there is located between them atransverse bar R, which practically forms a transverse In the art ofbox-making it has here- 65 rib for the die. A rod Q, having at one end aknob q and adjacent to its other end an oblique face q, is adapted toenter between the cheek-plates o and below the die 0, its obliqueportions (1 cooperating with the rib or rod R to raise the die as therod Q is thrust inwardly by pressure upon its knob q.

The box having been applied to the jaw G so that its overlapping edgeslie between the jaw and die 0, the rod Q is thrust inwardly, therebyforcing the die upwardly and tightly compressing the members of the boxbetween it and the shoe M. By applying the wedge action for raising thedie to a transverse rib substantially midway between its endsauniformityof pressure upon the parts of the box is obtained.

While I have shown but a single jaw G, it is obvious that any numbermaybe mounted upon the rail F.

While I show the rib R as being located approximately midway of the dieand prefer such location, it will measurably serve the purpose ofapplying the pressure uniformly throughout the length of the die iflocated anywhere between the ends thereof.

I claim as my invention 1. In a clamp for making boxes, in combination,a table, a rail secured to the table, a jaw fixed to the rail andextending over the table, a clamping-jaw below the fixed jaw and havinga transverse rib across its under face, and a wedge adapted to enterbetween such rib and the table.

2. In a clamp for making boxes, in combination, a table, a rail securedto the table and having a longitudinal T-groove in its upper face, a jawprojecting from the rail over the table, a T-bolt adapted to adjustablyenter the T-groove and engage the jaw, a clamping-jaw for cooperatingwith the first-mentioned jaw and having a transverse rib across itslower face, and a wedge adapted to enter between such rib and the table.

3. In a box-makers clamp, in combination, a fixed jaw, and aclamping-jaw having a transverse rib across its rearward face, a tableor other fixed abutment back of such clamping-jaw, and a wedge adaptedto enter between such fixed member and the clamping-jaw and having itsbearing upon the latter through the medium of the rib.

4. In abox-makers clamp, in combination, a table, a rail fixed to thetable, a jaw adjustably fixed to the rail and projecting laterallytherefrom over the table, a clamping-jaw between the table and thefirst-mentioned jaw and comprising a die, cheek-plates inclosing suchdie and extending above and below the same and a transverse rib acrossthe back of the die substantiallymidwaybetween itsends; and a wedgeadapted to enter between the rib and the table.

\VALTER L. SMITH.

Witnesses:

LoUIs K. GILLsoN, PAUL CARPENTER.

